"After 24 hours of some crossed wires and miscommunication, I can confirm that I and the rest of the original band have been invited to join Foreigner for a song or two at any show during this 40th anniversary year," Gramm explained on Twitter. "[Drummer] Dennis Elliot and [bassist] Rick Wills will be in St. Augustine, FL on 2/24. [multi-instrumentalist] Ian McDonald, [keyboardist] Al Greenwood and I will perform on a date yet to be determined."

Apart from a two-year break that started in 1990, Gramm served as Foreigner's lead singer from their formation in 1976 until 2003. Kelly Hansen has fronted the group since 2005. Guitarist Mick Jones - who together with Gramm was inducted into the Songwriters Hall of Fame in 2013 - is the sole remaining founding member in the band's current lineup.

Foreigner's 40th anniversary tour – featuring support from Cheap Trick and Jason Bonham - kicks off July 11th in Syracuse, N.Y., and is currently scheduled to wind up Sept. 9 in Auburn, Wash. A two-disc, 40-track compilation featuring some new material is also set for release this year, along with Jones' memoir, A Foreigner’s Tale.